<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Constraint nested grids demo</title>
  <link rel="stylesheet" href="demo.css"/>
  <link rel="stylesheet" href="../dist/gridstack-extra.min.css"/>
  <script src="../dist/gridstack-all.js"></script>
  <style type="text/css">
    .grid-stack-item.sub .grid-stack-item-content {
      background: lightpink;
    }
  </style>
</head>
<body>
  <div class="container-fluid">
    <h1>Constraint Nested grids demo</h1>
    <p>This example shows sub-grids only accepting pink items, while parent accept all.</p>
    <a class="btn btn-primary" onClick="addNested()" href="#">Add Widget</a>
    <a class="btn btn-primary" onClick="addNewWidget('.sub1')" href="#">Add Widget Grid1</a>
    <a class="btn btn-primary" onClick="addNewWidget('.sub2')" href="#">Add Widget Grid2</a>
    <span>entire save/re-create:</span>
    <a class="btn btn-primary" onClick="save()" href="#">Save</a>
    <a class="btn btn-primary" onClick="destroy()" href="#">Destroy</a>
    <a class="btn btn-primary" onClick="load()" href="#">Create</a>
    <span>partial save/load:</span>
    <a class="btn btn-primary" onClick="save(true, false)" href="#">Save list</a>
    <a class="btn btn-primary" onClick="save(false, false)" href="#">Save no content</a>
    <a class="btn btn-primary" onClick="destroy(false)" href="#">Clear</a>
    <a class="btn btn-primary" onClick="load(false)" href="#">Load</a>
    <br><br>
    <!-- grid will be added here -->
  </div>

  <script type="text/javascript">
    let sub1 = [ {x:0, y:0}, {x:1, y:0}, {x:2, y:0}, {x:3, y:0}, {x:0, y:1}, {x:1, y:1}];
    let sub2 = [ {x:0, y:0}, {x:0, y:1, w:2}];
    let count = 0;
    [...sub1, ...sub2].forEach(d => d.content = String(count++));
    let subOptions = {
      cellHeight: 50,
      column: 'auto', // size to match container. make sure to include gridstack-extra.min.css
      itemClass: 'sub', // style sub items differently and use to prevent dragging in/out
      acceptWidgets: '.grid-stack-item.sub', // only pink sub items can be inserted
      margin: 2,
      minRow: 1, // don't collapse when empty
    };
    let options = { // main grid options
      cellHeight: 50,
      margin: 5,
      minRow: 2, // don't collapse when empty
      acceptWidgets: true,
      id: 'main',
      children: [
        {y:0, content: 'regular item'},
        {x:1, w:4, h:4, subGridOpts: {children: sub1, class: 'sub1', ...subOptions}},
        {x:5, w:4, h:4, subGridOpts: {children: sub2, class: 'sub2', ...subOptions}},
      ]
    };

    // create and load it all from JSON above
    let grid = GridStack.addGrid(document.querySelector('.container-fluid'), options);

    addNested = function() {
      grid.addWidget({x:0, y:100, content:"new item"});
    }

    addNewWidget = function(selector) {
      let subGrid = document.querySelector(selector).gridstack;
      let node = {
        x: Math.round(6 * Math.random()),
        y: Math.round(5 * Math.random()),
        w: Math.round(1 + 1 * Math.random()),
        h: Math.round(1 + 1 * Math.random()),
        content: String(count++)
      };
      subGrid.addWidget(node);
      return false;
    };

    save = function(content = true, full = true) {
      options = grid.save(content, full);
      console.log(options);
      // console.log(JSON.stringify(options));
    }
    destroy = function(full = true) {
      if (full) {
        grid.destroy();
        grid = undefined;
      } else {
        grid.removeAll();
      }
    }
    load = function(full = true) {
      if (full) {
        grid = GridStack.addGrid(document.querySelector('.container-fluid'), options);
      } else {
        grid.load(options);
      }
    }

  </script>
</body>
</html>
